GUJCET - 2017 _ MCQ Exam _ Www.gujcet.in

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Sem 3 =>

Sem 3 => Maths: Ch - 6 | Chemist Maths: Ch - 6 | Chemistrr y: Ch - 6, 7y: Ch - 6, 7 Sem 4 =>

Sem 4 => Maths: Ch - 1 Maths: Ch - 1, 2, 3 | Chemis, 2, 3 | Chemistrtr y: Ch - 5, 6, 7y: Ch - 5, 6, 7

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1 FFiinnd d iinnccoorrrreecct t ssttaatteemmeenntt.. (a)

(a) Basicity of aromatic amines is less than that ofBasicity of aromatic amines is less than that ofammonia.ammonia. (b)(b)

Stability of aniline is less than that of anilinium Stability of aniline is less than that of anilinium ion. Hence aniline has greater tendency to ion. Hence aniline has greater tendency to accept proton.

accept proton. (c)

(c) Basicity of diethyl amine is greater than that ofBasicity of diethyl amine is greater than that of aniline.

aniline. (d)(d)

Basicity of diethyl amine is greater than that of Basicity of diethyl amine is greater than that of ethanamine.

ethanamine. 2

2 WWhhiicch h oof f tthhe e ffoolllloowwiinng g iis s mmoosst t bbaassiic c ??

((aa)) CC66HH55NNHH22 ((bb)) ((CC66HH55))NNHH ((cc)) CC22HH55NNHH22 ((dd)) ((CC22HH55))NNHH 3

3 OOn wn whihich ch siside de oof tf the he pepeptptidide ce chahain in C–C–tetermrmininaal rl resesididue ue is is wrwrititteten ?n ? ((aa)) RRiigghht t ssiiddee ((bb)) LLeefft t ssiiddee ((cc)) MMiiddddlle e oof f tthhe e cchhaaiinn ((dd)) OOn n aanny y ssiiddee 4

4 What is the IUPAC name of HWhat is the IUPAC name of H33C = CHCHC = CHCH22OH ?OH ?

((aa)) PPrroopp--22--yynnee--11--ooll ((bb)) PPrroopp--22--eennee--11--ooll ((cc)) 11--hhyyddrrooxxy y 22--PPrrooppaann ((dd)) PPrrooppeennooll

5

5 In general formula CIn general formula CnnHH2n-42n-4OOn-2n-2. What should be . What should be the value of 'n' for raffinose ?the value of 'n' for raffinose ? ((aa)) 1122 ((bb)) 1188

((cc)) 1144 ((dd)) 1133 6

6 WWhhiicch h iis s tthhe e ccoorrrreecct t pprriioorriitty y oorrddeer r ?? (a)

(a) -COOH, -CONH-COOH, -CONH22, -CHO, -COCH, -CHO, -COCH33 (b) -COOH, -CONH(b) -COOH, -CONH22, -COCH, -COCH33, -CHO, -CHO (c)

(c) -COOH, -COCH-COOH, -COCH33, -CONH, -CONH22, -CHO, -CHO (d)(d) -COCH-COCH33, -CONH, -CONH22, -COOH, -CHO, -COOH, -CHO

7

7 A particle moving in a straight line. has velocity v at any point, where vA particle moving in a straight line. has velocity v at any point, where v22 = 2 - 3x.If x represents its = 2 - 3x.If x represents its distance from a fixed point at time t then, acceleration of particle is _____

distance from a fixed point at time t then, acceleration of particle is _____ ((aa)) ccoonnssttaanntt ((bb)) zzeerroo

((cc)) vvaarriiaabbllee ((dd)) uunnddeefifinneedd 8

8 If the curvesIf the curves y  y  = = x  x 22 + +ax ax  + +bb and and y  y  = = x  x ((cc - - x  x ) touch each other at (1, 0) then _____ .) touch each other at (1, 0) then _____ . (a)

(a) a a = -3, = -3, bb = 2, = 2,cc = =11 ((bb)) a a = 3, = 3, bb = -2, = -2,cc = 1 = 1 (c)

(c) aa = -1, = -1, bb = -3, = -3,cc = =22 ((dd)) a a = 1, = 1, bb = 2, = 2, cc = 3 = 3 9

9 WhWhicich oh of tf the he fofollllowowining rg reaeagegennts ts cacan bn briring ng ababoout ut rrededucuctitioon on of kf ketetoone ne ?? (a)

(a) HH22 / Ni or LiAIH / Ni or LiAIH44 (b) Na + C(b) Na + C22HH55OHOH (c)

(c) NN22HH44 /OH /OH-- or Zn - Hg / HCL or Zn - Hg / HCL (d)(d) All of tAll of the abhe abovovee 10

10 GiGive ve bobond nd ananglgle ie in C n C - O - O - C - C anand hd hybrybrididizizatatioion on of of oxyxygegen an atotom im in sn simimplple ee eththerer.. (a

(a)) 18180º0º,,spsp (b)(b) 117º,117º,spsp22

(c)

(2)

11 Which of the following reactions will be used to prepare ethyl benzene from acetophenone ? (a) Clemmensen reduction (b) Grignard reagent

(c) Condensation reaction (d) Cannizzaro reaction 12 Which colour is produced when schiff's reagent is added to glucose ?

(a) Violet (b) Orange

(c) Green (d) Nocolour

13 Basicity of amine is greater than _____ .

(a) alcohol (b) ether

(c) ester (d) All the given

14 What is the number of moles of monocarboxylic acid required to convert 5 moles of glycerol into corresponding ester ?

(a) 5 (b) 10

(c) 15 (d) 15

15 Benzoic acid when heated with X  gives benzene and phenol when heated withY  (also) gives benzene. What are respectively X  andY  ?

(a) Sodalime and copper (b) Zn powder and NaOH (c) Zinc powder and sodalime (d) Sodalime and Zn - powder 16 What is used to prepare bakelite plastic ?

(a) Acetone (b) Methanal

(c) Benzaldehyde (d) Acetophenone 17 The rate of the second order reaction depends on _____ .

(a) concentration of neucleophile (b) only concentration of substrate (c) concentration of product (d) concentration of two reactants 18 The maximum area of a right angled triangle with hypotenuse h is :

(a) h322 (b) h22

(c) h22 (d) h24

19 Which of the following has higher SN2 reactivity ?

(a) 2-bromo propane (b) 2-bromo-2-methyl butane (c) 1-bromo propane (d) 2-bromo-2-methyl propane 20 The two curves x3 - 3xy2 + 2 = 0 and 3x2y - y3 - 2 = 0 _____ .

(a) cut at right angles (b) touch each other (c) cut an angle π3 (d) cut an angle π4 21 ∫0π2cos3xdx= _____.

(a) 23 (b) 83

(c) 0 (d) 1

22 In a ΔABC if sides a and b remain constant such that α is the error in C, then relative error in its area is _____ .

(a) αcotC (b) α sinC

(3)

23 f ( x ) = (3 - x )e2 x  - 4 xe x  - 1 then _____ .

(a) f ( x ) has maximum value at x  =0 (b) f ( x ) has minimum value at x  = 0 (c) f ( x ) has not maximum or minimum value for x 

= 0 (d) f ( x ) is not differentiable at x  = 0 24 Which catalyst is used in preparation of bromobenzene by bromination of benzene ?

(a) FeBr3 (b) HBr

(c) AlBr3 (d) Br2

25 The radius of a cone increases at the rate of 4 cm/sec and the altitude is decreasing at the rate of 3 cm/sec. When the radius is 3 cm and altitude is 4 cm, the rate of change of lateral surface is _____. (a) 30π cm2/sec (b) 10 cm2/sec

(c) 20π cm2/sec (d) 22π cm2/sec

26 In the presence of which reagent does glucose reacts with (CH3CO)2O to give pentaacetyl glucose by acetylation reaction ?

(a) Pyridine (b) Anhydrous AICI3 (c) Pyrine (d) All of the above 27 What is formed when ammonium acetate is heated at high temperature ?

(a) Acetic acid + ammonia (b) Acetamide

(c) Formamide (d) Urea

28  ∫-ππ(cos pt - sin qt)2 dt = _____ where p and q z - {0}

(a) -π (b) 0

(c) π (d) 2π

29 By which enzyme, is the fermentation of sugar present in molasses carried out, so that sugar is converted into glucose and fructose ?

(a) Zymase (b) Invertase

(c) Maltase (d) Diastase

30 ∫sin8 x - cos8 x1-2sin2xcos2xdx = _____ + c

(a) -sin x cos x (b) sin x cos x

(c) sin2x (d) cos2x

31 If fx=λsinx+6cosx2sinx+3cosx is strictly increasing function, then

(a) λ>1 (b) λ<1

(c) λ<4 (d) λ>4

32 What is formed when amide is heated with P4O10 ?

(a) Amine (b) Nitrile

(c) Ester (d) Aldol

33 If ∫1kfx=81 and fx= 3x2+21≤x≤28x ,2<x≤kthen,k  = _____

(a) 3 (b) 4

(c) 5 (d) 6

34 ∫sinx + cosxsin2xdx = _____

(a) sin-1sinx-cosx (b) sin-1sinx+cosx (c) sin-1cosx-sinx (d) none of these.

(4)

35 What is the IUPAC name of CH3COCH (CH3)2 ?

(a) 3-methyl-2-butenone (b) iso propyl methyl ketone (c) 2-methyl-3-butenone (d) 4-methyl iso propyl ketone 36 ∫0π1+4sin2x2-4sinx2 dx = _____

(a) 43-4 (b) 43-4-π3

(c) π-4 (d) 2π3-4-43

37

Which two of the following statements are correct for phenol ? (1) Phenol is more acidic than alcohol.

(2) Phenol is used in production of melamine plastic.

(3) Phenol gives violet colour with neutral ferric chloride solution. (4) Phenol when heated with acetyl chloride gives phenetole.

(a) Statements (3) and (4) (b) Statements (1) and (4) (c) Statements (2) and (3) (d) Statements (1) and (3)

38 In the carbonyl group of aldehyde and ketone, what is the nature of double bond between C and O and type of hybridization of carbon ?

(a) Both σ - bonds, sp3 - hybridization (b) Both π - bonds, sp - hybridization (c) One σ - bond, and one π - bond, sp2

 -hybridization (d) One σ - bond, and one π - bond, sp 3  -hybridization

39 ∫1x(x5+1)dx =_____+c

(a) 15logx5x5+1 (b) logx5x5+1

(c) 16logx6x6+1 (d) logxx+1

40 ∫π6π3dx1+tan2 x3 = _____ .

(a) π4 (b) π12

(c) π6 (d) π2

41 ∫e4log x5 + 1-1dx = _____ + c

(a) log x5 + 1 (b) 15log x5 + 1 (c) -log x5 + 1 (d) -4x5 + 12 42 ∫0πsin 4xsin x dx = _____

(a) 0 (b) 1

(c) π2 (d) π

43 If the line y=x touches the curve y=x2+bx+c at (1, 1), then_____ (a) b = 1, c = 2 (b) b = -1, c = 1 (c) b = 1, c = 1 (d) b = 0, c = 1 44 Primary amines may not be obtained by _____ .

(a) the reduction of nitroalkanes (b) the reduction of isocyanides (c) the decarboxylation of amino acids (d) Hoffmann degradation of amides

(5)

45 Which diazonium salt is insoluble in water and stable at room temp. ? (a) C6H5-N2+·Cl- (b) C6H5-N2+·Br-(c) C6H5-N2+·HSO4- (d)

C6H5-N2+·BF4-46 The point of curve y=aexa+e-xa at which the tangent drawn is parallel to X-axis, then x - co-ordinate of that point is _____

(a) a (b) 2a

(c) -2a (d) 0

47 Which of the following is not formed by Sandmayer reaction ?

(a) C6H5Cl (b) C6H5I

(c) C6H5Br (d) C6H5CN

48 ∫dx5-4 cosx= _____ +c

(a) 13tan-13 tan x2 (b) 13tan-123 tan x2 (c) 23tan-113 tan x2 (d) 23tan-13 tan x2 49 fx=x2+ax+5 is increasing on (2, 3), then minimum value of a R is _____

(a) 4 (b) -2

(c) -4 (d) 2

50 ∫1k f(x) dx = 47, f(x) = 2x + 81≤x≤26x2<x≤k, thenk = _____ .

(a) 4 (b) -4

Figure

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